Graham Markall

@gmarkall
313 Followers
405 Following
408 Posts
Professional interests: Python, CUDA, Compilers.
Personal interests: RISC-V, PSXDev, OSHW, 日本語.
Recreation: family time, cycling, running, cooking.
Githubhttps://github.com/gmarkall
Personal site:https://big-grey.co.uk
Graham MarkallFeb 15

Fixing the Spyro 3 Spooky Swamp lost gem glitch

https://big-grey.co.uk/2026/02/15/fixing-the-spyro-3-spooky-swamp-lost-gem-glitch/

Graham MarkallJan 26

Testing StarFive JH7110 Display Controller patches:

https://big-grey.co.uk/2026/01/26/testing-starfive-jh7110-display-controller-patches/

Graham MarkallJan 26
LinkedIn, in a nutshell
Graham MarkallNov 14
How did I only learn today that you can trivially write a function that returns itself in Python?
Graham MarkallNov 3

I just noticed Python's math.nextafter with the steps kwarg seems like a good pedagogical tool for getting a feel for how floating point numbers work and represent values (see screenshot)

Also math.ulp() as a complementary tool:

>>> math.ulp(1.5)
2.220446049250313e-16

>>> math.ulp(1500000)
2.3283064365386963e-10

Graham MarkallOct 20
One of those "need a debugger for my debugger" Monday mornings
Graham MarkallOct 17
A large and complex code change is definitely best reviewed by looking at exactly one file at a time and navigating through files with a "previous / next" interface.
Graham MarkallJan 10, 2025
Yeah but this one goes up to 101...
Graham MarkallSep 29, 2024
The people spontaneously decide to recognize your many years of enlightened leadership. Craftsmen, masons, laborers, and artisans turn out to build a fine addition to your palace.
Graham MarkallSep 18, 2024
I too will continue to work, but may not perform at my peak either.